| Business | Phone |
| Sun Gard 19201 La Grange Rd 203, Mokena 60448 | (708) 479-8890 |
| Smolinski Consulting 11508 Ashbury Ct, Mokena 60448 | (815) 469-0910 |
| Chesapeake System Solutions 19543 Kevin Ln, Mokena 60448 | (708) 478-7350 |
| Compinovations 9960 191st St B, Mokena 60448 | (708) 326-3996 |
| Modular Industrial Computers Po Box 686, Mokena 60448 | (708) 479-9875 |
| Miller Systems Inc Po Box 98, Mokena 60448 | (708) 479-0085 |